TW202033650A - Flame retardant resin composition, flame retardant resin composition for cable, cable, molded article using the same, flame retardant masterbatch and flame retardant - Google Patents

Abstract

A flame-retardant resin composition includes a base resin (A) including a polyolefin resin, and a flame retardant. The flame retardant includes an organic phosphorus compound (B) and a hindered amine compound (C), the organic phosphorus compound (B) being represented by general formula (1), and the hindered amine compound (C) having a group represented by general formula (2). (In general formula (1), a hydrocarbon group which may have a substituent is represented, and the substituents may be the same or different.) (In general formula (2), R1-R4 each independently represent a C1-8 alkyl group, and R5 represents a C1-50 alkyl group, a C5-12 cycloalkyl group, a C7-25 aralkyl group, or a C6-12 aryl group.).

Description

Flame-retardant resin composition, flame-retardant resin composition for cable, cable, molded body, flame retardant master batch and flame retardant using the same

The present invention relates to a flame-retardant resin composition, a flame-retardant resin composition for cables, a cable using the same, a molded body, a flame-retardant master batch, and a flame-retardant agent.

Polyolefin resin has excellent mechanical properties, so it is widely used in building materials, packaging materials, OA equipment, automotive components, cables, etc. Since polyolefin resin is a flammable substance, it can be used in a state where various flame retardants such as halogen-based flame retardants, phosphorus-based flame retardants, and metal hydrate-based flame retardants are added. Although halogen-based flame retardants can impart excellent flame retardancy, they are prone to produce toxic gas or smoke during combustion, so there are regulations that need to be followed in various countries. Therefore, in recent years, flame retardant resin compositions using non-halogen flame retardants have been expected. As such a flame-retardant resin composition, a flame-retardant resin composition using a phosphoric acid ester and a NOR-type hindered amine compound in combination is known (see Patent Document 1 below). [Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2017-66299 A

[Problem Solved by Invention]

The flame-retardant resin composition described in Patent Document 1 above shows excellent flame retardancy. However, the flame-retardant resin composition described in Patent Document 1 has room for improvement from the viewpoint of suppression of separation of the flame-retardant agent. Therefore, the so-called separation of the flame retardant refers to the separation of the flame retardant (unmixed) when the resin is mixed with the flame retardant, or once dispersed in the resin composition, the flame retardant is directly or decomposed into a solid or liquid state. It is discharged on the surface of the resin composition to reduce the flame retardancy.

In view of the foregoing, the present invention provides a flame-retardant resin composition having excellent flame-retardant properties and capable of suppressing the separation of the flame-retardant agent, cables, flame-retardant resin compositions for cables, and molded articles using the same And flame retardant masterbatch and flame retardant for the purpose. [Means to solve the problem]

The inventors of the present invention repeated the examination to solve the above-mentioned problems. As a result, it has been found that a flame-retardant resin composition in which a specific organophosphorus compound and a specific hindered amine compound are added to a base resin containing a polyolefin resin can solve the aforementioned problems.

(上述一般式(1)中，X¹ 及X² 表示可具有取代基的烴基，可為相同或相異)。

(上述一般式(2)中，R¹ ～R⁴ 各獨立表示碳數1～8的烷基，R⁵ 表示碳數1～50的烷基、碳數5～12的環烷基、碳數7～25的芳烷基或碳數6～12的芳基)。That is, the present invention is a flame-retardant resin composition containing: a base resin (A) containing a polyolefin resin and a flame retardant; the aforementioned flame retardant contains an organophosphorus compound (B) and a hindered amine compound (C); The aforementioned organophosphorus compound (B) is represented by the following general formula (1), and the aforementioned hindered amine compound (C) has a group represented by the following general formula (2);

(In the above general formula (1), X ¹ and X ² represent optionally substituted hydrocarbon groups, and may be the same or different).

(In the above general formula (2), R ¹ to R ⁴ each independently represent an alkyl group with 1 to 8 carbons, and R ⁵ represents an alkyl group with 1 to 50 carbons, a cycloalkyl group with 5 to 12 carbons, and 7-25 aralkyl or 6-12 aryl).

The flame retardant resin composition of the present invention has excellent flame retardancy and can suppress the separation of the flame retardant.

In addition, the reason why the inventors of the present invention has excellent flame retardancy is as follows.

That is, the organophosphorus compound (B) represented by the above general formula (1) contains a large amount of phosphorus in the molecular structure and is difficult to separate from the base resin (A), so it has excellent flame retardancy. On the other hand, the hindered amine compound (C) also has a group represented by the general formula (2), and can impart excellent flame retardancy. As a result, it is inferred that the flame-retardant resin composition may have excellent flame retardancy.

In addition, although the reason for suppressing the separation of the flame retardant by the flame retardant resin composition of the present invention is inconclusive, the inventors deduced as follows.

That is, since the organophosphorus compound has a spiro ring structure, it has a high melting point, does not melt during molding of the flame-retardant resin composition, and is difficult to separate from the polyolefin resin. On the other hand, when the flame-retardant resin composition does not contain the organophosphorus compound (B), the hindered amine compound (C) will melt when the flame-retardant resin composition is molded compared to the organophosphorus compound (B). The tendency to separate easily from polyolefin resins. In contrast, since the flame-retardant resin composition contains the organophosphorus compound (B), the general formula (2) of the organophosphorus compound (B) and the hindered amine compound (C) in the flame-retardant resin composition of the present invention It is also difficult to separate the hindered amine compound (C) from the organophosphorus compound (B) during the formation of the flame-retardant resin composition by the interaction of the groups. Therefore, it is difficult to separate the hindered amine compound (C) from the polyolefin resin during the molding of the flame-retardant resin composition. As a result, it is inferred that the separation of the flame retardant may be suppressed for the flame retardant resin composition.

Regarding the flame-retardant resin composition, in the general formula (1), the hydrocarbon group represented by X ¹ and X ² is, for example, an aliphatic hydrocarbon group or an aromatic hydrocarbon group.

For the flame-retardant resin composition, in the general formula (1), the hydrocarbon group represented by X ¹ and X ² is preferably an aromatic hydrocarbon group.

In this case, the hydrolysis resistance of the flame-retardant resin composition can be further improved. Although the reason for the improved hydrolysis resistance is inconclusive, it is inferred that the aromatic hydrocarbon group acts as a steric hindrance to water molecules or an electronic action, which may hinder the hydrolysis of the organophosphorus compound (B).

For the flame-retardant resin composition, the aromatic hydrocarbon group is preferably phenylmethyl (benzyl).

In this case, the hydrolysis resistance and flame retardancy of the flame retardant resin composition can be more effectively improved.

In the general formula (1) of the above-mentioned flame-retardant resin composition, if the hydrocarbon group represented by X ¹ and X ² is an aromatic hydrocarbon group or a phenylmethyl (benzyl) group, it is placed at 85°C and 85°C. After placing it in a constant temperature bath of %RH for 48 hours, when performing surface observation or tentacle confirmation, it is better if no foreign matter is confirmed on the surface.

The flame-retardant resin composition has more excellent hydrolysis resistance.

In the flame-retardant resin composition, it is preferable that the hindered amine compound (C) is added at a ratio of less than 0.4 parts by mass to 100 parts by mass of the base resin (A).

At this time, compared with the case where the hindered amine compound (C) is added at a ratio of 0.4 parts by mass or more, the flame-retardant resin composition can further suppress the generation of odor.

Although the reason for suppressing the generation of odor by the above-mentioned flame-retardant resin composition is inconclusive, the inventors inferred as follows.

That is, although the odor is considered to be caused by the amine-based substance generated by the decomposition of the hindered amine compound, as mentioned above, the hindered amine compound (C) is difficult to separate from the organophosphorus compound (B) and is small, so it is inferred that The generated amine-based substances are also difficult to separate from the organophosphorus compound (B). As a result, it is inferred that the odor generated by the amine-based substance becomes difficult to release in the flame-retardant resin composition, and the generation of odor can be suppressed.

In the flame retardant resin composition, the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is preferably 5.6 or more.

In this case, compared with the case where the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is less than 5.6, the flame retardancy of the flame retardant resin composition can be further improved.

In the flame retardant resin composition, the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is preferably 11.1 or less.

In this case, compared with the case where the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) exceeds 11.1, the flame retardancy of the flame retardant resin composition can be further improved.

For the above-mentioned flame-retardant resin composition, the number of groups represented by the general formula (2) (hereinafter referred to as "amine number") in 1 g unit in the hindered amine compound (C) is 1×10 ²¹ or more Better.

In this case, compared with the case where the number of amines per 1 g unit in the hindered amine compound (C) is less than 1×10 ²¹ , the flame retardancy of the flame retardant resin composition can be further improved.

For the flame-retardant resin composition, the hindered amine compound (C) preferably has a plurality of groups represented by the general formula (2) in one molecule.

In this case, compared with the case where the hindered amine compound (C) has only one group represented by the general formula (2) in one molecule, the flame retardancy of the flame retardant resin composition can be further improved.

In the above-mentioned flame-retardant resin composition, it is preferable that R ⁵ represents an alkyl group having 1 to 30 carbon atoms or a cycloalkyl group having 5 to 12 carbon atoms in the general formula (2).

In this case, for the general formula (2), compared to the case where R ^{5 is} not any one of a C 1-30 alkyl group and a C 5-12 cycloalkyl group, the flame retardant resin composition can be further improved Flame retardant.

Among the above-mentioned flame-retardant resin compositions, the hindered amine compound (C) is preferably a solid at 25°C.

In this case, compared with the case where the hindered amine compound (C) is liquid at 25°C, the processability of the flame-retardant resin composition can be further improved.

Among the above-mentioned flame-retardant resin compositions, the hindered amine compound (C) has a decomposition temperature of 240°C or higher.

In this case, compared with the case where the decomposition temperature of the hindered amine compound (C) is less than 240°C, the flame retardancy and processability of the flame retardant resin composition can be further improved.

Among the above-mentioned flame-retardant resin compositions, the hindered amine compound (C) preferably contains a triazine ring.

In this case, compared with the case where the hindered amine compound (C) does not contain a triazine ring, the flame retardancy and processability of the flame retardant resin composition can be further improved.

In the flame-retardant resin composition, in the general formula (2), R ⁵ represents, for example, a cycloalkyl group having 5 to 12 carbon atoms.

Among the above-mentioned flame-retardant resin compositions, the hindered amine compound (C) has a decomposition temperature of 250°C or higher.

In this case, compared with the case where the decomposition temperature of the hindered amine compound (C) is less than 250°C, the flame retardancy and processability of the flame retardant resin composition can be further improved.

Among the above-mentioned flame-retardant resin compositions, it is preferable that R ⁵ represents an alkyl group having 1 to 30 carbon atoms in the general formula (2).

At this time, in the general formula (2), the flame retardancy and processability of the flame retardant resin composition can be further improved compared to the case where R ^{5 is} not an alkyl group having 1 to 30 carbon atoms.

Among the above-mentioned flame-retardant resin compositions, the hindered amine compound (C) does not contain a triazine ring.

In this case, as compared with the case where the hindered amine compound (C) contains a triazine ring, it is possible to further suppress the coloration (yellowing) upon deterioration by heat or light.

The above-mentioned flame-retardant resin composition preferably further contains a drip preventive agent (D).

In this case, it is possible to suppress resin dripping (dripping) of the flame-retardant resin composition during combustion.

In the flame retardant resin composition, the melting point of the organic phosphorus compound (B) is higher than the melting temperature of the base resin (A), and the melting point of the hindered amine compound (C) is higher than that of the base resin (A). The lower temperature is better.

In this case, the flame retardant resin composition can further sufficiently suppress the separation of the flame retardant.

In the flame-retardant resin composition of the present invention, the reason why the separation of the flame-retardant agent can be further sufficiently suppressed is inconclusive, but the inventors speculate as follows.

That is, since the organophosphorus compound has a spiro ring structure, it has a high melting point, does not melt during molding of the flame-retardant resin composition, and is not easily separated from the polyolefin resin. On the other hand, the melting point of the hindered amine compound (C) is lower than the melting temperature of the base resin (A), and the melting point of the organophosphorus compound (B) is higher than the melting temperature of the base resin (A), so it is a flame retardant resin When the composition does not contain the organophosphorus compound (B), when the flame-retardant resin composition is molded at the melting temperature of the base resin (A), the molten hindered amine compound (A) tends to self-polymerize The tendency of olefin resin to separate. In contrast, in the flame-retardant resin composition of the present invention, the flame-retardant resin composition has an organophosphorus compound (B), and when the flame-retardant resin composition is molded at the melting temperature of the base resin (A), The hindered amine compound (C) is immersed in the solid organophosphorus compound (B) dispersed in the base resin (A) and can be captured by the organophosphorus compound (B). Therefore, even when the flame-retardant resin composition of the present invention is molded at the melting temperature of the base resin (A), the hindered amine compound (C) is not easily separated from the polyolefin resin. As a result, it can be inferred that the separation of the flame retardant in the flame retardant resin composition may be sufficiently suppressed.

In the flame-retardant resin composition, the melting point of the organophosphorus compound (B) is higher than the melting temperature of the base resin (A) by 40°C or more, for example.

In the flame-retardant resin composition, the melting point of the hindered amine compound (C) is, for example, lower than the melting temperature of the base resin (A) by 3°C or more.

In the flame-retardant resin composition, the blending ratio of the hindered amine compound (C) is preferably 0.5 parts by mass or more based on 100 parts by mass of the base resin (A).

At this time, compared with the case where the blending ratio of the hindered amine compound (C) is less than 0.5 parts by mass to 100 parts by mass of the base resin (A), the flame retardancy of the flame retardant resin composition can be further improved.

In the flame-retardant resin composition, the blending ratio of the organophosphorus compound (B) is preferably 5 parts by mass or more with respect to 100 parts by mass of the base resin (A).

In this case, the flame retardancy of the flame retardant resin composition can be further improved compared to the case where the blending ratio of the organophosphorus compound (B) is less than 5 parts by mass to 100 parts by mass of the base resin (A).

In the above-mentioned flame-retardant resin composition, the flame-retardant agent preferably contains only the organic phosphorus compound (B) and the hindered amine compound (C).

The above-mentioned flame-retardant resin composition does not satisfy any of the following (i) and (ii). (i) Foreign matter was confirmed on the surface of the aforementioned flame-retardant resin composition (ii) After leaving the flame-retardant resin composition in a thermostat at 85°C for 48 hours, foreign matter was confirmed on the surface of the flame-retardant resin composition

When the flame-retardant resin composition is subjected to a combustion test of automotive interior materials based on FMVSS No. 302, it satisfies any of the following requirements (a) or (b). (a) Self-extinguishing when seen (b) Although no self-extinguishing is seen, the burning speed is 102mm/min or less

In addition, the present invention is a flame-retardant resin composition for cables comprising the flame-retardant resin composition.

When the flame-retardant resin composition for cables of the present invention is used as at least a part of the insulator of the cable, it can impart excellent flame retardancy to the cable, and the flame retardancy of the cable can be maintained over a long period of time. Therefore, in the flame-retardant resin composition for cables of the present invention, the cables can be replaced over a long period of time.

In addition, the cable of the present invention includes a transmission medium composed of a conductor or an optical fiber, and an insulator covering the transmission medium, and the insulator includes an insulating portion made of the flame-retardant resin composition.

In the cable of the present invention, the insulating portion has excellent flame retardancy and is composed of a flame retardant resin composition that can suppress separation of the flame retardant. Therefore, the cable of the present invention has excellent flame retardancy, and the flame retardancy can be maintained over a long period of time. Therefore, the cable of the present invention does not need to be replaced after a long period of time.

Furthermore, the present invention is a molded body containing the above-mentioned flame-retardant resin composition.

The molded body has excellent flame retardancy and contains a flame retardant resin composition that can suppress the separation of the flame retardant. Therefore, the molded body of the present invention has excellent flame retardancy, and the flame retardancy can be maintained over a long period of time. Therefore, the molded body of the present invention does not need to be replaced after a long period of time.

The above-mentioned molded body may include at least one sheet layer containing the above-mentioned flame-retardant resin composition.

In addition, the present invention is a flame retardant master batch containing the flame retardant resin composition.

The flame retardant master batch of the present invention contains the flame retardant resin composition. The flame retardant resin composition has excellent flame retardancy and can suppress the separation of the flame retardant. Therefore, even if the flame retardant master batch of the present invention is kneaded with other resins to produce a molded body, the molded body has excellent flame retardancy and can suppress the separation of the flame retardant.

(上述一般式(1)中，X¹ 及X² 表示可具有取代基的烴基，可為相同或相異)。

(上述一般式(2)中，R¹ ～R⁴ 各獨立表示碳數1～8的烷基，R⁵ 表示碳數1～50的烷基、碳數5～12的環烷基、碳數7～25的芳烷基或碳數6～12的芳基)。Furthermore, the present invention contains an organophosphorus compound (B) and a hindered amine compound (C). The aforementioned organophosphorus compound (B) is represented by the following general formula (1), and the aforementioned hindered amine compound (C) has the following general formula (2). ) Flame retardant of the base shown.

(In the above general formula (1), X ¹ and X ² represent optionally substituted hydrocarbon groups, and may be the same or different).

(In the above general formula (2), R ¹ to R ⁴ each independently represent an alkyl group with 1 to 8 carbons, and R ⁵ represents an alkyl group with 1 to 50 carbons, a cycloalkyl group with 5 to 12 carbons, and 7-25 aralkyl or 6-12 aryl).

When this flame retardant is kneaded with a base resin (A) containing a polyolefin resin to produce a flame retardant resin composition, it can impart excellent flame retardancy to the flame retardant resin composition. In addition, when the flame retardant of the present invention is kneaded with the base resin (A) containing polyolefin resin, it is difficult to separate from the base resin (A). Therefore, the flame retardant in the flame retardant resin composition can be suppressed. Separate.

Regarding the flame retardant, in the general formula (1), the hydrocarbon group represented by X ¹ and X ² is, for example, an aliphatic hydrocarbon group or an aromatic hydrocarbon group.

For the flame retardant, in the general formula (1), the hydrocarbon group represented by X ¹ and X ² is preferably an aromatic hydrocarbon group.

When the flame retardant is kneaded with the base resin (A) containing a polyolefin resin to produce a flame retardant resin composition, the flame retardant resin composition can be further improved in hydrolysis resistance.

Among the above flame retardants, the aromatic hydrocarbon group is preferably phenylmethyl.

When the flame retardant is kneaded with the base resin (A) containing polyolefin resin to produce a flame retardant resin composition, it can further effectively improve the hydrolysis resistance and flame retardancy of the flame retardant resin composition .

Among the above flame retardants, it is preferable that the melting point of the organic phosphorus compound (B) is higher than the melting point of the hindered amine compound (C).

When the flame retardant is kneaded with the base resin (A) containing polyolefin resin at the melting temperature of the base resin (A) to produce a flame retardant resin composition, it can impart excellent flame retardancy to the flame retardant resin composition Sex. In addition, even if the flame retardant of the present invention is kneaded with the base resin (A) containing polyolefin resin at the melting temperature of the base resin (A), it is difficult to separate from the base resin (A) and can be further sufficiently suppressed Separation of flame retardant in flammable resin composition.

Among the above-mentioned flame retardants, those containing only the organophosphorus compound (B) and the hindered amine compound (C) are preferred.

Among the above flame retardants, it is preferable that the hindered amine compound (C) has a mass ratio of the organophosphorus compound (B) of 5.6 or more.

When the flame retardant is kneaded with the base resin (A) containing a polyolefin resin to produce a flame retardant resin composition, the flame retardancy of the flame retardant resin composition can be further improved.

Among the flame retardants, it is preferable that the hindered amine compound (C) has a mass ratio of the organophosphorus compound (B) of 11.1 or less.

When the flame retardant is added to the flame retardant resin composition, the flame retardant resin composition can be further improved compared to the case where the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) exceeds 11.1 The flame resistance.

In addition, in the present invention, the "decomposition temperature" of the hindered amine compound means the decomposition temperature measured by thermogravimetric/differential analysis (TG/DTA). Specifically, the following is used for the sample containing the hindered amine compound The measuring device measures the decomposition temperature obtained under the following measuring conditions. Here, the decomposition temperature means the temperature at which the weight of the hindered amine compound is reduced by 1%. (Measuring device) Product name "TG/DTA6300" (manufactured by Hitachi High Tech Science Co., Ltd.) (Measurement conditions) Sample amount: about 5mg Measuring temperature: 25°C to 600°C Measurement environment: air flow (200mL/min) Heating rate: 10℃/min Material of sample container: Aluminum (Al)

In the present invention, the "melting temperature" of the base resin (A) means the following temperature. (1) When the base resin (A) is composed only of crystalline polymer, the melting point (°C) of the base resin (A) + 30°C (2) When the base resin (A) is composed only of amorphous polymer, the glass transition point (°C) of the base resin (A) + 30°C (3) When the base resin (A) is composed of a mixture of a crystalline polymer and an amorphous polymer (physical blend or copolymer, etc.), it is the crystalline polymer and the amorphous polymer Melting point or glass transition temperature of the most contained component +30℃ In addition, "+30°C" means that the temperature when the resin is melt-processed is considered to be set at a value 30°C higher than the melting point or glass transition point of general resins.

In the present invention, the melting point of the base resin (A) is determined by the method specified in JIS K7121. Specifically, using a differential scanning calorimeter (DSC), after heating to a degree of melting, crystallization is performed at a cooling rate of 5°C/min to remove the heat, and the temperature is raised again at a rate of 10°C/min. The apex of the melting absorption peak when measuring the DSC curve under the conditions as the melting point.

In the present invention, the glass transition point of the base resin (A) is determined by the method specified in JIS K7121. Specifically, by means of a differential scanning calorimeter (DSC), after heating to a degree of molten state, it is crystallized at a cooling rate of 5°C/min to dissipate heat, and then the heating rate is 20°C/min. The middle point of the change of the reference line when measuring the DSC curve under the conditions is regarded as the glass transition temperature. [Effects of Invention]

According to the present invention, there is provided a flame-retardant resin composition having excellent flame-retardant properties and capable of inhibiting the separation of the flame-retardant agent, a flame-retardant resin composition for cables, a cable using the same, a molded body, and a flame-retardant mother Materials and flame retardants.

[Type of Implementation of Invention]

The embodiments of the present invention will be described in detail below.

(上述一般式(1)中，X¹ 及X² 表示可具有取代基的烴基，可為相同或相異)。

(上述一般式(2)中，R¹ ～R⁴ 各獨立表示碳數1～8的烷基，R⁵ 表示碳數1～50的烷基、碳數5～12的環烷基、碳數7～25的芳烷基或碳數6～12的芳基)。<Flame retardant resin composition> The flame retardant resin composition of the present invention contains a base resin (A) containing a polyolefin resin and a flame retardant, and the flame retardant contains an organophosphorus compound (B) and a hindered amine compound ( C). Here, the organophosphorus compound (B) is represented by the following general formula (1), and the hindered amine compound (C) has a group represented by the following general formula (2).

(In the above general formula (1), X ¹ and X ² represent optionally substituted hydrocarbon groups, and may be the same or different).

(In the above general formula (2), R ¹ to R ⁴ each independently represent an alkyl group with 1 to 8 carbons, and R ⁵ represents an alkyl group with 1 to 50 carbons, a cycloalkyl group with 5 to 12 carbons, and 7-25 aralkyl or 6-12 aryl).

The flame retardant resin composition of the present invention has excellent flame retardancy and can inhibit the separation of the flame retardant. In addition, in the flame-retardant resin composition of the present invention, the flame-retardant agent is not easily separated from the base resin (A). Therefore, the flame retardant resin composition of the present invention can be useful as a flame retardant master batch to which a flame retardant is added at a high concentration.

Hereinafter, the base resin (A), the organophosphorus compound (B), and the hindered amine compound (C) will be described in detail.

(A) Basic resin The base resin (A) contains polyolefin resin. The polyolefin resin is a molecule having a structural unit derived from an olefin (unsaturated aliphatic hydrocarbon), and is composed of a non-denatured polyolefin resin or a modified polyolefin resin. These can be used individually or in mixture of 2 or more types.

(A1) Non-denatured polyolefin resin Examples of non-denatured polyolefin resins include ethylene-based polymers, propylene-based polymers, and olefin-based thermoplastic elastomers. These can be used individually or in mixture of 2 or more types.

The ethylene-based polymer is a polymer containing a structural unit derived from ethylene, and examples of the ethylene-based polymer include polyethylene, ethylene-α-olefin copolymer, and ethylene propylene diene copolymer.

Examples of polyethylene include high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear polyethylene (LLDPE), ultra-low density polyethylene (VLDPE), Metallocene ultra-low density polyethylene, etc. These can be used individually or in mixture of 2 or more types.

The term "propylene-based polymer" means a polymer mainly containing structural units derived from a propylene group. Examples of propylene-based polymers include homopolypropylene, propylene-ethylene copolymer, and propylene-α olefin copolymer. Examples of α-olefins include 1-butene, 2-butene, 1-hexene, 2-hexene, and the like.

When the propylene-based polymer is a copolymer such as a propylene-ethylene copolymer or a propylene-α olefin copolymer, the copolymer may be a block copolymer or a random copolymer, but a block copolymer is preferred. When the copolymer is a block copolymer, the abrasion resistance of the flame-retardant resin composition can be further improved compared with the case of a random copolymer.

Examples of olefin-based elastomers include polypropylene elastomers and olefin-ethylene-butene-olefin copolymers such as olefin crystal-ethylene-butene-olefin crystal block copolymer (CEBC copolymer). These can be used individually or in mixture of 2 or more types.

The non-denatured polyolefin resin is preferably one containing an olefin-based elastomer from the viewpoint of improving impact resistance.

(A2) Denatured polyolefin resin The modified polyolefin resin means a resin obtained by denaturing the above-mentioned polyolefin resin or the precursor by grafting or copolymerization. Examples of functional groups introduced by denaturation include carboxyl groups, acid anhydride groups, methacryloxy groups, acryloxy groups, acrylic groups, acetoxy groups, and alkoxy groups (for example, methoxy or ethoxy). Wait. Among them, carboxyl groups and acid anhydride groups are also preferred. In this case, the functional group introduced by denaturation can more efficiently improve the abrasion resistance of the flame-retardant resin composition compared to the case of functional groups other than carboxyl groups and acid anhydride groups. Examples of substances used for grafting or copolymerization include acids, acid anhydrides, and derivatives thereof. Examples of the acid include carboxylic acids such as acetic acid, acrylic acid, maleic acid, and methacrylic acid. Examples of acid anhydrides include carboxylic anhydrides such as maleic anhydride.

Examples of modified resins include ethylene-vinyl acetate copolymer, ethylene-acrylate copolymer, ethylene-methacrylate copolymer, maleic acid modified polyolefin, maleic anhydride modified polyolefin, and maleic acid modified polyolefin. Styrene elastomers and maleic anhydride modified styrene elastomers.

(A3) Non-polyolefin resin The base resin (A) may further contain a non-polyolefin resin in addition to the polyolefin resin. From the viewpoint of improving impact resistance, the non-polyolefin resin preferably contains a non-olefin elastomer. Examples of non-olefin elastomers include styrene-butadiene rubber (SBR), styrene-ethylene-butadiene-styrene copolymer (SEBS copolymer), and styrene-propylene-butadiene- Styrene copolymer (SPBS copolymer), styrene-butadiene-styrene copolymer (SBS copolymer), styrene-isoprene-styrene copolymer (SIS copolymer) and other olefins and styrene Block copolymer, hydrogenated product modified by hydrogenation (hydrogenated SBR, hydrogenated SEBS copolymer, hydrogenated SPBS copolymer, hydrogenated SBS copolymer, hydrogenated SIS copolymer). These can be used individually or in mixture of 2 or more types.

(B) Organophosphorus compound The organophosphorus compound (B) is a flame retardant and is represented by the following general formula (1) as described above.

In the above general formula (1), X ¹ and X ² represent a hydrocarbon group which may have a substituent. X ¹ and X ² may be the same or different from each other.

As a hydrocarbon group, an aliphatic hydrocarbon group and an aromatic hydrocarbon group are mentioned, for example.

The aliphatic hydrocarbon group may have any of cyclic, linear, and branched structures. As an aliphatic hydrocarbon group, an alkyl group, a cycloalkyl group, etc. are mentioned, for example.

Examples of the above-mentioned alkyl group include methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl Alkyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl and octadecyl, etc.

Examples of the cycloalkyl group include cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl, cyclododecyl, and the like.

Although the carbon number of the aliphatic hydrocarbon group is not particularly limited, it is usually 1-10, preferably 1-4.

As an aromatic hydrocarbon group, an aryl group, an aralkyl group, etc. are mentioned.

As an aryl group, a phenyl group, a naphthyl group, an anthryl group, etc. are mentioned.

Examples of the aralkyl group include phenylmethyl (benzyl), phenylethyl, phenylpropyl, naphthylmethyl, naphthylethyl, anthrylmethyl, and anthrylethyl.

For the above general formula (1), X ¹ and X ² are preferably aromatic hydrocarbon groups. In this case, the hydrolysis resistance of the flame-retardant resin composition can be further improved.

Among them, the aromatic hydrocarbon group is preferably phenylmethyl (benzyl). In this case, compared with the case where X ¹ and X ² in the general formula (1) are phenylmethyl groups, the hydrolysis resistance and flame retardancy of the flame retardant resin composition can be further effectively improved.

Although the mixing ratio of the organic phosphorus compound (B) to 100 parts by mass of the base resin (A) is not particularly limited, it is preferably 0.1 parts by mass or more. In this case, the flame retardancy of the flame retardant resin composition can be further improved compared to the case where the mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) is less than 0.1 parts by mass.

The mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) is preferably 1 part by mass or more. In this case, the flame retardancy of the flame retardant resin composition can be further improved compared to the case where the mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) is less than 1 part by mass. With regard to the blending ratio of 100 parts by mass of the organic phosphorus compound (B) of the base resin (A), from the viewpoint of further improving the flame retardancy of the flame retardant resin composition, 3 parts by mass or more is preferable, and 5 The ones with more than mass part are better.

The mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) is preferably 50 parts by mass or less. At this time, compared with the case where the mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) exceeds 50 parts by mass, the processability of the flame-retardant resin composition can be further improved.

(C) Hindered amine compound The hindered amine compound (C) is a flame retardant, and it should just have a group represented by the following general formula (2).

Regarding the above general formula (2), R ¹ to R ⁴ each independently represent an alkyl group having 1 to 8 carbons, and R ⁵ represents an alkyl group having 1 to 50 carbons, a cycloalkyl group having 5 to 12 carbons, and 7 carbons. -25 aralkyl group or aryl group having 6-12 carbons.

Regarding the above general formula (2), examples of the alkyl group represented by R ¹ to R ⁴ include methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, and octyl.

Among them, "alkyl" is not only a non-substituted alkyl group, but also includes a substituted alkyl group. As the substituted alkyl group, a hydrogen atom substituted for an unsubstituted alkyl group can be used.

For the above general formula (2), examples of the alkyl group represented by R ⁵ include methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, and decyl Monoalkyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl and octadecyl, etc.

Examples of the cycloalkyl group represented by R ⁵ include cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl, cyclododecyl, and the like.

Examples of the aralkyl group represented by R ⁵ include phenylmethyl (benzyl), phenylethyl, phenylpropyl, naphthylmethyl, naphthylethyl, anthrylmethyl, and anthrylethyl. .

Examples of the aryl group represented by R ⁵ include phenyl and naphthyl.

(上述式(3)中，R⁶ ～R⁹ 表示烷基胺基，R¹⁰ ～R¹⁴ 表示上述一般式(2)所示基，R¹⁵ 及R¹⁶ 表示伸烷基，R¹⁷ 表示烷基亞胺基。n表示1～15的整數)。

(上述式(4)中，R¹⁸ ～R²⁰ 表示下述一般式(5)所示基)。

(上述式(5)中，R²¹ ～R²⁴ 表示上述一般式(2)所示基或烷基，R²¹ ～R²⁴ 中至少2個表示上述一般式(2)所示基)。Specific examples of the hindered amine compound (C) include a compound represented by the following formula (3) and a compound represented by the following formula (4).

(In the above formula (3), R ⁶ to R ⁹ represent an alkylamino group, R ¹⁰ to R ¹⁴ represent a group represented by the above general formula (2), R ¹⁵ and R ¹⁶ represent an alkylene group, and R ¹⁷ represents an alkyl group Imino group. n represents an integer of 1-15).

(In the above formula (4), R ¹⁸ to R ²⁰ represent groups represented by the following general formula (5)).

(In the above formula (5), R ²¹ to R ²⁴ represent a group or an alkyl group represented by the above general formula (2), and at least two of R ²¹ to R ²⁴ represent a group represented by the above general formula (2)).

Although the number of amines per 1 g in the hindered amine compound (C) is not particularly limited, it is preferably 1×10 ²¹ or more.

In this case, compared with the case where the number of amines per 1 g in the hindered amine compound (C) is less than 1×10 ²¹ , the flame retardancy of the flame retardant resin composition can be further improved.

However, the number of amines per 1 g of the hindered amine compound (C) is preferably 3×10 ²¹ or less.

The hindered amine compound (C) preferably has a plurality of groups represented by the general formula (2) in one molecule.

In this case, compared with the hindered amine compound (C) having only one group represented by the general formula (2) in one molecule, the flame retardancy of the flame retardant resin composition can be further improved.

Furthermore, in the general formula (2), R ⁵ preferably represents an alkyl group having 1 to 30 carbon atoms or a cycloalkyl group having 5 to 12 carbon atoms.

In this case, the general formula (2) can further improve the flame-retardant resin composition compared with the case where R ^{5 is} not any one of a C 1-30 alkyl group and a C 5-12 cycloalkyl group The flame resistance.

Although the hindered amine compound (C) may be solid or liquid at 25°C, it is preferably solid. In this case, the dead hindered amine compound (C) can further improve the processability of the flame retardant resin composition compared to the case where the dead hindered amine compound (C) is liquid at 25°C.

The decomposition temperature of the hindered amine compound (C) is not particularly limited, but it is preferably 240°C or higher.

In this case, compared with the case where the decomposition temperature of the hindered amine compound (C) is less than 240°C, the flame retardancy of the flame retardant resin composition can be further improved. Furthermore, compared with the case where the decomposition temperature of the hindered amine compound (C) is less than 240°C, the moldability of the flame-retardant resin composition can be further improved. That is, the hindered amine compound (C) does not easily decompose during the molding of the flame-retardant resin composition, and it is possible to sufficiently suppress the fluctuation of the discharge amount from the molding device or the generation of bubbles.

The hindered amine compound (C) may or may not contain a triazine ring, but it is preferably contained.

In this case, compared with the case where the hindered amine compound (C) does not contain a triazine ring, the flame retardancy and processability of the flame retardant resin composition can be further improved.

The hindered amine compound (C) preferably has a decomposition temperature of 250°C or higher. In this case, compared with the case where the decomposition temperature of the hindered amine compound (C) is less than 250°C, the flame retardancy of the flame retardant resin composition can be further improved. Furthermore, compared with the case where the decomposition temperature of the hindered amine compound (C) is less than 250°C, the moldability of the flame-retardant resin composition can be more sufficiently improved. That is, the flame-retardant resin composition becomes more difficult to decompose the hindered amine compound (C) during molding, and it is possible to further sufficiently suppress the fluctuation of the discharge amount from the molding device, the generation of bubbles, and the like.

For the above-mentioned flame-retardant resin composition, in the aforementioned general formula (2), R ⁵ preferably represents an alkyl group having 1 to 30 carbon atoms.

In this case, in the general formula (2), the flame retardancy and processability of the flame retardant resin composition can be improved more than when R ^{5 is} not an alkyl group having 1 to 30 carbon atoms.

Although the mixing ratio of the hindered amine compound (C) of 100 parts by mass of the base resin (A) is not particularly limited, it is preferably 0.01 parts by mass or more. At this time, compared to the case where the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is less than 0.01 parts by mass, the flame retardancy of the flame retardant resin composition can be further improved.

The mixing ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is preferably 0.05 parts by mass or more. At this time, compared to the case where the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is less than 0.05 parts by mass, the flame retardancy of the flame retardant resin composition can be further improved. The blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A), from the viewpoint of further improving the flame retardancy of the flame retardant resin composition, is preferably 0.1 parts by mass or more. 0.15 parts by mass or more is better, and more preferably 0.5 parts by mass or more.

It is preferable that the mixing ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is 15 parts by mass or less. In this case, compared with the case where the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) exceeds 15 parts by mass, the processability of the flame-retardant resin composition can be further improved. The mixing ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is preferably 10 parts by mass or less, and more preferably 5 parts by mass or less.

In addition, the mixing ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) may not be 0.4 parts by mass. At this time, compared with the case where the mixing ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is 0.4 parts by mass or more, the odor of the flame-retardant resin composition can be further suppressed. Therefore, the flame-retardant resin composition is particularly useful for materials requiring special odor suppression such as automobile interior materials or air-conditioning ducts. For the blending ratio of the hindered amine compound (C) in 100 parts by mass of the base resin (A), from the viewpoint of further suppressing the odor of the flame retardant resin composition, 0.3 parts by mass or less is preferred, and 0.2 parts by mass or less The one is better.

(上述式中，m_B 表示有機磷化合物(B)的質量，m_C 表示受阻胺化合物(C)之質量)。In addition, although the mass ratio of the hindered amine compound (C) to the organophosphorus compound (B), that is, the mass ratio R represented by the following formula is not particularly limited, it is preferably 5.6 or more.

(In the above formula, m _B represents the mass of the organophosphorus compound (B), m _C represents the mass of the hindered amine compound (C)).

At this time, compared with the case where the mass ratio R is less than 5.6, the flame retardancy of the flame retardant resin composition can be further improved.

The quality ratio R is better than 6.3.

However, the mass ratio R is preferably 11.1 or less. In this case, compared with the case where the mass ratio R exceeds 11.1, the flame retardancy of the flame retardant resin composition can be further improved. The mass ratio R is preferably 10.5 or less.

For the above-mentioned flame-retardant resin composition, the melting point T _B (°C) of the organophosphorus compound (B) is higher than the melting temperature T (°C) of the base resin (A), and the melting point T _C (°C) of the hindered amine compound (C) ) Is preferably lower than the melting temperature T (°C) of the base resin (A). In this case, the flame-retardant resin composition can more sufficiently suppress the separation of the flame-retardant agent.

At this time, if the melting point T _B (°C) of the organophosphorus compound (B) is higher than the melting temperature T (°C) of the base resin (A), T _B -T is, for example, 40°C or higher. However, when considering the temperature stability of T _B -T during the processing of the flame-retardant resin composition, it is preferably 20°C or higher.

The melting point T _C (° C) of the hindered amine compound (C) may be lower than the melting temperature T (° C) of the base resin (A), and T _C -T is, for example, -3° C. or lower. However, T _C -T is preferably below -20°C. Considering that T _C -T is the temperature stability of the flame-retardant resin composition during processing, it is preferably -30°C or less.

For the above-mentioned flame retardant resin composition, although the flame retardant contains the organophosphorus compound (B) and the hindered amine compound (C), the flame retardant is composed only of the organophosphorus compound (B) and the hindered amine compound (C) The one is better.

(D) Drip preventive In addition to the base resin (A), the organophosphorus compound (B), and the hindered amine compound (C), the flame-retardant resin composition further contains a drip preventive agent (D). At this time, it becomes possible to suppress resin dripping (dripping) during combustion of the flame-retardant resin composition.

As a drip preventive agent, a fluorine-based drip preventive agent is preferable.

The fluorine-based drip preventive agent is a fluorine-containing compound containing fluorine, and what is necessary is to prevent resin dripping (dripping) during combustion. Examples of such fluorine-containing compounds include fluorine resins such as polytetrafluoroethylene (hereinafter referred to as "PTFE"), polyfluorovinylidene, and polyhexafluoroethylene. In addition, the fluorine-containing compound may be an undenatured fluorine-containing compound or a denatured fluorine-containing compound, but the denatured one is preferred. At this time, compared with the case where the fluorine-containing compound is not denatured, the fluorine-containing compound can be fibrillated efficiently, and the dispersibility in the flame-retardant resin composition can be further improved. As a result, the drip prevention function of the drip prevention agent (D) can be further improved. In addition, since the melt tension of the flame-retardant resin composition becomes larger, the processability and moldability of the flame-retardant resin composition can be improved. Examples of the denatured fluorine-containing compound include acid denatured polytetrafluoroethylene.

In the flame-retardant resin composition, the drip preventive agent (D) is preferably added at a ratio of more than 0 parts by mass to 100 parts by mass of the base resin (A) and 5 parts by mass or less.

At this time, unlike the case where the blending ratio of the drip prevention agent (D) to 100 parts by mass of the base resin (A) is 0 parts by mass, the performance of drip prevention is different from that for 100 parts by mass of the base resin (A). Compared with the case where the compounding ratio of the preventive agent (D) exceeds 5 parts by mass, the melt viscosity of the flame-retardant resin composition can be more sufficiently prevented from becoming too high, and the processability of the flame-retardant resin composition can be further improved.

The mixing ratio of the drip preventive agent (D) to 100 parts by mass of the base resin (A) is preferably 0.2 parts by mass or more. In this case, compared to the case where the blending ratio of the drip preventive agent (D) to 100 parts by mass of the base resin (A) is less than 0.2 parts by mass, better flame retardancy for the flame retardant resin composition can be obtained. In addition, the mixing ratio of the drip prevention agent (D) to 100 parts by mass of the base resin (A) is preferably 2 parts by mass or more.

The above-mentioned flame-retardant resin composition does not meet any of the following (i) and (ii). (i) For the aforementioned flame-retardant resin composition, when surface observation or tentacle confirmation is performed, foreign matter is confirmed on the surface of the aforementioned flame-retardant resin composition; (ii) After placing the flame-retardant resin composition in a thermostat at 85°C for 48 hours, the flame-retardant resin composition should be tested on the surface of the flame-retardant resin composition during surface observation or tentacle confirmation. A foreign body was confirmed on the surface.

Here, the term "foreign matter" means the flame retardant or its decomposition product contained in the flame retardant resin composition. In addition, the surface observation or tentacle confirmation of (i) was performed without placing the flame-retardant resin composition in a thermostat at 85°C for 48 hours.

In addition, when the flame-retardant resin composition is subjected to a combustion test of automotive interior materials based on FMVSS No. 302, it satisfies either of the following requirements (a) or (b). (a) Self-extinguishing when seen; (b) Although no self-extinguishing is seen, the burning rate is 102 mm/min or less.

In addition, in the above-mentioned flame-retardant resin composition, when the hydrocarbon group represented by X ¹ and X ² is an aromatic hydrocarbon group or a phenylmethyl (benzyl) group in the general formula (1), the flame-retardant resin The composition is placed in a thermostat at 85°C and 85%RH (Relative Humidity) and left for 48 hours. When surface observation or tentacle confirmation is performed on the flame-retardant resin composition, it is preferable that no foreign matter is confirmed on the surface.

The flame-retardant resin composition has relatively excellent hydrolysis resistance. In addition, the term "foreign matter" means the flame retardant or its decomposition product contained in the flame retardant resin composition.

The above-mentioned flame-retardant resin composition may further contain antioxidants, thermal degradation inhibitors, ultraviolet absorbers, ultraviolet degradation inhibitors, anti-fogging agents, and crosslinking agents, as necessary, within the range that does not affect the flame retardancy or processability. Agents, foaming agents, conductive fillers, heat dispersants, coloring pigments, processing aids, etc.

The flame retardant resin composition can be obtained by kneading the base resin (A), the organophosphorus compound (B), and the hindered amine compound (C). Kneading is to use a mixer that can provide the following two steps for processing; the necessary heating step to melt the base resin (A) and the necessary to disperse the organophosphorus compound (B) and hindered amine compound (C) Cut steps. As the kneader, for example, an open roll, a two-axis extruder, a Bunbury mixer, a pressure kneader, etc. can be used.

＜Cable＞ (The first embodiment of the cable) Next, the first embodiment of the cable of the present invention will be described with reference to FIGS. 1 and 2 below. Fig. 1 shows a partial side view of the first embodiment of the cable according to the present invention, and Fig. 2 shows a cross-sectional view taken along the line II-II in Fig. 1.

As shown in FIGS. 1 and 2, the cable 10 includes a conductor 1 as a transmission medium and an insulator 2 covering the conductor 1. The insulator 2 has a first insulating layer 3 as an insulating part covering the conductor 1 and a second insulating layer 4 as an insulating part covering the first insulating layer 3.

Among them, the first insulating layer 3 and the second insulating layer 4 are composed of the above-mentioned flame-retardant resin composition, which has excellent flame-retardant properties and can suppress the separation of the flame retardant. Therefore, the first insulating layer 3 and the second insulating layer 4 composed of the above-mentioned flame-retardant resin composition have excellent flame resistance, and the flame resistance can be maintained over a long period of time. Therefore, the cable 10 does not need to be replaced after a long period of time.

(conductor) The conductor 1 may be composed of only one strand (strand) wire, or may be constituted by binding a plurality of strands of strands. The conductor 1 is not particularly limited in terms of the conductor diameter or the conductor material, and can be adapted to the application. Decide appropriately. As the material of the conductor 1, for example, an alloy containing copper, aluminum, or these is preferable, but conductive materials such as carbon materials can also be used.

(The second embodiment of the cable) Next, the second embodiment of the cable of the present invention will be described with reference to FIG. 3 below. Fig. 3 shows a cross-sectional view of an optical fiber cable as a second embodiment of the cable of the present invention.

As shown in FIG. 3, the cable 20 includes two tension members 22 and 23, an optical fiber 24 as a transmission medium, and an insulator 25 covering these. Among them, the optical fiber 24 is provided to penetrate the insulator 25. Here, the insulator 25 is composed of an insulating part covering the optical fiber 24. In the first embodiment of the above-mentioned cable, the insulating part is composed of the flame-retardant resin composition constituting the first insulating layer 3 and the second insulating layer 4. constitute.

Among them, the above-mentioned flame-retardant resin composition has excellent flame-retardant properties and can suppress separation of the flame-retardant agent. Therefore, the insulator 25 composed of the above-mentioned flame-retardant resin composition has excellent flame-retardant properties, and the flame-retardant properties can be maintained over a long period of time. Therefore, the optical fiber cable 20 does not need to be replaced after a long period of time.

＜Molded body＞ Next, the molded body of the present invention will be explained.

The molded body of the present invention contains the above-mentioned flame-retardant resin composition, and the flame-retardant resin composition has excellent flame retardancy and can suppress the separation of the flame retardant. Therefore, the molded body has excellent flame retardancy, and the flame retardancy can be maintained over a long period of time. Therefore, the molded body of the present invention does not need to be replaced after a long period of time. The molded body of the present invention is suitable for use in, for example, the rear panel of a TV, the outer shell of a capacitor, the insulating film inside the keyboard, the inner panel of a heater, the flame-retardant sheet of a building, the instrument panel of an automobile, packaging materials, and the outer shell of home appliances It must be used for larger tasks when renewing.

The shape of the molded body of the present invention is not particularly limited. As the shape of the molded body, for example, a sheet shape, a spherical shape, a rectangular parallelepiped shape, a cube shape, a foam shape, etc. may be mentioned, but the shape of the molded body is preferably a sheet shape.

When the shape of the molded body is a sheet shape, the molded body has a sheet layer composed of the above-mentioned flame-retardant resin composition. At this time, the molded body may be composed of only one sheet layer, or may be composed of a laminate of a plurality of sheet layers.

The molded body is obtained by molding the above-mentioned flame-retardant resin composition using, for example, an extrusion molding method, an injection molding method, a vacuum molding method, a pressure molding method, a blow molding method, an inflation molding method, or the like. The molded body may be composed of a flame-retardant resin composition alone, or may be composed of a combination of a flame-retardant resin composition and reinforcing materials such as glass cloth and paper depending on the application.

＜Flame Retardant＞ Next, the flame retardant of the present invention will be explained.

The flame retardant of the present invention contains an organophosphorus compound (B) and a hindered amine compound (C). However, the flame retardant of the present invention does not contain resin. The organophosphorus compound (B) is represented by the above general formula (1), and the hindered amine compound (C) has a group represented by the above general formula (2).

The organophosphorus compound (B) and hindered amine compound (C) are as described above.

When the flame retardant of the present invention is kneaded with the base resin (A) containing a polyolefin resin to produce a flame retardant resin composition, it can impart excellent flame retardancy to the flame retardant resin composition. In addition, when the flame retardant of the present invention is kneaded with the base resin (A) containing polyolefin resin, it is not easily separated from the base resin (A), and the separation of the flame retardant in the flame retardant resin composition can be suppressed .

In the above-mentioned flame retardant, the hydrocarbon group represented by X ¹ and X ^{2 in the} general formula (1) represents, for example, an aliphatic hydrocarbon group or an aromatic hydrocarbon group.

For the above general formula (1), the hydrocarbon group represented by X ¹ and X ² is preferably an aromatic hydrocarbon group. When the flame retardant is kneaded with the base resin (A) containing a polyolefin resin to produce a flame retardant resin composition, the flame retardant resin composition can be further improved in hydrolysis resistance.

Among the above-mentioned flame retardants, the above-mentioned aromatic hydrocarbon group phenylmethyl is preferred.

At this time, when the flame retardant is kneaded with the base resin (A) containing polyolefin resin to produce a flame retardant resin composition, the hydrolysis resistance and flame retardancy of the flame retardant resin composition can be further effectively improved .

In addition, for the flame retardant, the mixing ratio of the organophosphorus compound (B) and the hindered amine compound (C) is not particularly limited, but it is assumed that the flame retardant contains the base resin (A) and the above-mentioned flame retardant resin composition Among them, the mixing ratio of the organophosphorus compound (B) and the hindered amine compound (C) for 100 parts by mass of the base resin (A) may be the same.

For the flame retardant, the mass ratio R of the organophosphorus compound (B) to the hindered amine compound (C) is preferably 5.6 or more. At this time, compared with the case where the mass ratio R is less than 5.6, the flame retardant can further improve the flame retardancy of the flame retardant resin composition.

The quality ratio R is better than 6.3.

However, the mass ratio R is preferably 11.1 or less. At this time, compared with the case where the mass ratio R exceeds 11.1, the flame retardant can further improve the flame retardancy of the flame retardant resin composition. The mass ratio R is preferably 10.5 or less.

The organic phosphorus compound (B) and the hindered amine compound (C) are as described above for the flame-retardant resin composition.

＜Flame retardant masterbatch＞ Next, the flame retardant master batch of the present invention will be described.

The flame retardant master batch of the present invention is composed of the above flame retardant resin composition.

The flame retardant master batch of the present invention is composed of the above flame retardant resin composition, and the flame retardant resin composition has excellent flame retardancy and can inhibit the separation of the flame retardant. Therefore, even if the flame retardant master batch of the present invention is kneaded with other resins to produce a molded body, the molded body has excellent flame retardancy and can suppress the separation of the flame retardant.

In the flame retardant master batch of the present invention, the mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) is preferably 5 parts by mass or more, and more preferably 20 parts by mass or more. However, the blending ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) is preferably 200 parts by mass or less. In this case, the dispersibility of the flame retardant is superior compared to the case where the mixing ratio of the organophosphorus compound (B) to 100 parts by mass of the base resin (A) exceeds 200 parts by mass. The mixing ratio of the organic phosphorus compound (B) to 100 parts by mass of the base resin (A) is preferably 100 parts by mass or less.

In addition, for the flame retardant master batch of the present invention, the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is preferably 0.5 parts by mass or more, preferably 2 parts by mass or more . However, the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is preferably 50 parts by mass or less. In this case, the dispersibility of the flame retardant is superior compared to the case where the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) exceeds 50 parts by mass.

Furthermore, for the flame retardant master batch of the present invention, from the viewpoint of suppressing the odor of the flame retardant master batch, the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) may not be Up to 0.4 parts by mass. At this time, the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is preferably 0.3 parts by mass or less. However, the blending ratio of the hindered amine compound (C) to 100 parts by mass of the base resin (A) is preferably 0.01 parts by mass or more. At this time, compared to the case where the blending ratio of the hindered amine compound (C) per 100 parts by mass of the base resin (A) is less than 0.01 parts by mass, the flame retardancy is superior.

For the flame retardant master batch, the mass ratio R of the organophosphorus compound (B) to the hindered amine compound (C) is preferably 5.6 or more. At this time, compared with the case where the mass ratio R is less than 5.6, the flame retardant masterbatch can further improve the flame retardancy of the flame retardant resin composition.

The quality ratio R is better than 6.3.

However, the mass ratio R is preferably 11.1 or less. At this time, compared with the case where the mass ratio R exceeds 11.1, the flame retardant master batch can further improve the flame retardancy of the flame retardant resin composition. The mass ratio R is preferably 10.5 or less.

For the organophosphorus compound (B) and hindered amine compound (C), the flame-retardant resin composition is as described above.

This invention is not limited to the above-mentioned embodiment. For example, in the above embodiment, although the cable 10 has only one conductor 1, the cable of the present invention is not limited to a cable having only one conductor 1. It may also be a cable having conductors 1 separated from each other. line.

In the above embodiment, although the first insulating layer 3 and the second insulating layer 4 are composed of the above-mentioned flame-retardant resin composition, the first insulating layer 3 may not be composed of the above-mentioned flame-retardant resin composition. Structure, and only the second insulating layer 4 is composed of the above-mentioned flame-retardant resin composition. Alternatively, the second insulating layer 4 may not be composed of the flame-retardant resin composition, and only the first insulating layer 3 may be composed of the flame-retardant resin composition.

Furthermore, for the cable 20, although the insulator 25 is composed of an insulating part, the insulator 25 may further have a covering part covering the insulating part. Among them, in the above-mentioned embodiment, the covering portion may be composed of the flame-retardant resin composition constituting the first insulating layer 3 and the second insulating layer 4, or may not be composed, but in the above-mentioned embodiment, the It is preferable that the insulating layer 3 and the second insulating layer 4 are composed of a flame-retardant resin composition.

Moreover, in the above embodiment, although the cable 20 has tension members 22 and 23, for the cable of the present invention, the tension members are not necessarily required, and may be omitted. [Example]

The following examples are used to illustrate the content of the present invention in more detail, but the present invention is not limited to the following examples.

(Examples 1 to 121 and Comparative Examples 1 to 14) The base resin (A), the organophosphorus compound (B) and the hindered amine compound (C) were blended in the amounts shown in Tables 1-22, and kneaded at 190°C using a Bunbury mixer to obtain Combustible resin composition. In addition, in Tables 1-22, the unit of the compounding amount of each compounding component is part by mass.

As the base resin (A), the organophosphorus compound (B), and the hindered amine compound (C), the following are specifically used. (A) Basic resin (A1) Polypropylene (PP) (A1-1) Block copolymer of propylene and vinyl (block PP) Trade name "NovatecBC4BSW", manufactured by Japan Polypropylene Corporation, crystallinity, melting point: 165°C (A1-2) Homo PP Trade name "NovatecMA3", manufactured by Japan Polypropylene Corporation, crystallinity, melting point: 165°C (A1-3) Random copolymer of propylene and vinyl (random PP) Trade name "WintechWFW4M", manufactured by Japan Polypropylene Corporation, crystallinity, melting point: 135°C (A2) Polyethylene (PE) Product name "Excellen GMH GH030", manufactured by Sumitomo Chemical Co., Ltd., crystallinity, melting point: 101°C (A3) Ethylene-ethyl acrylate copolymer (EEA) Trade name "LexpearlA1150", manufactured by Japan Polyethylene Corporation, crystallinity, melting point: 100°C (A4) Propylene-α olefin copolymer Trade name "TuffmerPN2060", manufactured by Mitsui Chemicals Co., Ltd., crystallinity, melting point: 160°C (A5) Ethylene-α olefin copolymer Trade name "TuffmerDF810", manufactured by Mitsui Chemicals Co., Ltd., crystallinity, melting point: 66°C (A6) Hydrogenated Styrene Butadiene Rubber (HSBR) Product name "Dynaron1320P", manufactured by JSR Co., Ltd., amorphous, glass transition point: lower than 100°C (<100°C) (A7) Olefin elastomer Olefin crystal-ethylene-butene-olefin crystal block copolymer (CEBC), trade name "Dynaron 6200P", manufactured by JSR Co., Ltd., crystallinity, melting point: 90°C (A8) Maleic anhydride denatured polyolefin (maleic anhydride PO) Trade name "TuffmerMA8510", manufactured by Mitsui Chemicals Co., Ltd., crystallinity, melting point: 70°C

(B2)有機磷化合物2 下述結構式所示有機磷化合物(一般式(1)中，X¹ 及X² 為甲基)，熔點：比240℃高，磷含有量：24%

(B3)有機磷化合物3 下述結構式所示有機磷化合物，熔點：96℃，磷含有量：10質量%

(B4)有機磷化合物4 下述結構式所示間苯二酚雙-雙二甲苯基磷酸酯，熔點：92℃，磷含有量：9.0質量%

(B5)有機磷化合物5 下述結構式所示有機磷化合物(一般式(1)中，X¹ 及X² 為乙基)，熔點：比240℃高，磷含有量：22質量%

(B6)有機磷化合物6 下述結構式所示有機磷化合物(一般式(1)中，X¹ 及X² 為丙基)，熔點：比240℃高，磷含有量：20質量%

(B7)有機磷化合物7 下述結構式所示有機磷化合物(一般式(1)中，X¹ 及X² 為苯基乙基)、熔點：比240℃高，磷含有量：14質量%

(B8)有機磷化合物8 下述結構式所示有機磷化合物(一般式(1)中，X¹ 及X² 為苯基丙基)，熔點：比240℃高，磷含有量：13質量%

(B9)有機磷化合物9 下述結構式所示有機磷化合物(一般式(1)中，X¹ 及X² 為萘甲基)，熔點：比240℃高，磷含有量：12質量%

(B) Organophosphorus compound (B1) Organophosphorus compound 1 The organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are phenylmethyl (benzyl)), melting point: ratio High 240°C (>240°C), phosphorus content: 15% by mass

(B2) Organophosphorus compound 2 The organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are methyl groups), melting point: higher than 240°C, phosphorus content: 24%

(B3) Organophosphorus compound 3 The organophosphorus compound represented by the following structural formula, melting point: 96°C, phosphorus content: 10% by mass

(B4) Organophosphorus compound 4 Resorcinol bis-bis-xylyl phosphate represented by the following structural formula, melting point: 92°C, phosphorus content: 9.0% by mass

(B5) Organophosphorus compound 5 The organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are ethyl groups), melting point: higher than 240°C, phosphorus content: 22% by mass

(B6) Organophosphorus compound 6 The organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are propyl groups), melting point: higher than 240°C, phosphorus content: 20% by mass

(B7) Organophosphorus compound 7 The organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are phenylethyl), melting point: higher than 240°C, phosphorus content: 14% by mass

(B8) Organophosphorus compound 8 The organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are phenylpropyl), melting point: higher than 240°C, phosphorus content: 13% by mass

(B9) Organophosphorus compound 9 Organophosphorus compound represented by the following structural formula (in general formula (1), X ¹ and X ² are naphthylmethyl), melting point: higher than 240°C, phosphorus content: 12% by mass

(C2)受阻胺化合物2 下述結構式所示受阻胺化合物，商品名「Flamestab NOR117 FF」，BASF公司製，熔點：121℃，分解溫度：247℃，每1g之胺數：1.6×10²¹ 個，三嗪環的有無：有

(C3)受阻胺化合物3 下述結構式所示受阻胺化合物，商品名 「AdekastabLA-81」，ADEKA公司製，熔點：在25℃為液體，分解溫度：239℃，每1g之胺數：1.77×10²¹ 個，三嗪環的有無：無

(C4)受阻胺化合物4 下述結構式所示受阻胺化合物，商品名「Hostavin NOW」，Clariant公司製，熔點：95℃，分解溫度：236℃，每1g之胺數：2.88×10²⁰ 個，三嗪環的有無：無

(C) Hindered amine compound (C1) Hindered amine compound 1 The hindered amine compound represented by the following structural formula, trade name "TINUVIN NOR371 FF", manufactured by BASF Corporation, melting point: 104°C, decomposition temperature: 264°C, per 1g of amine Number: 1.48×10 ²¹ ～1.67×10 ²¹ , presence or absence of triazine ring: Yes

(C2) Hindered amine compound 2 The hindered amine compound represented by the following structural formula, trade name "Flamestab NOR117 FF", manufactured by BASF Corporation, melting point: 121°C, decomposition temperature: 247°C, number of amines per 1 g: 1.6×10 ²¹ A, the presence or absence of triazine ring: Yes

(C3) Hindered amine compound 3 Hindered amine compound represented by the following structural formula, trade name "AdekastabLA-81", manufactured by ADEKA Corporation, melting point: liquid at 25°C, decomposition temperature: 239°C, number of amines per 1 g: 1.77 ×10 ²¹ , presence or absence of triazine ring: none

(C4) Hindered amine compound 4 Hindered amine compound represented by the following structural formula, trade name "Hostavin NOW", manufactured by Clariant Corporation, melting point: 95°C, decomposition temperature: 236°C, number of amines per 1g: 2.88×10 ²⁰ , The presence or absence of triazine ring: none

[Feature Evaluation] For the flame retardant resin compositions of Examples 1 to 121 and Comparative Examples 1 to 14 obtained as described above, the separation suppression effect and flame retardancy of the flame retardant were evaluated as follows. In addition, the flame-retardant resin compositions of Examples 1 to 121 and Comparative Examples 1 to 6 were evaluated for hydrolysis resistance as follows. In addition, the flame-retardant resin compositions of Examples 26 to 29, 31 to 32, 43, 46 to 49, 83 to 121 and Comparative Examples 11 to 14 were evaluated for odor as follows. The processability of the flame retardant resin compositions of Examples 46 to 49 and 107 to 110 was further evaluated, and the flame retardant resin compositions of Examples 55 to 58 and 118 to 121 were further evaluated for their coloring properties when they were deteriorated. The evaluation.

＜Test sheet＞ To evaluate the separation inhibition effect, flame retardancy, hydrolysis resistance, and odor of the flame retardant, a test sheet 1 with a thickness of 0.1 mm as follows was produced. That is, the flame-retardant resin compositions of Examples 1 to 121 and Comparative Examples 1 to 14 were kneaded with a Bunbury mixer at 190°C, and then press-molded to produce a thickness of 350mm×100mm×0.1 Test sheet 1 with dimensions of mm (thickness). In addition, for the flame retardant resin compositions of Examples 1 to 5, 18 to 57, 59 to 70, and 88 to 117, in order to evaluate the flame retardancy, the thickness was set to other than 0.3 mm and 0.5 mm, and further produced Test sheet 1 The same test sheets 2 and 3.

＜Separation inhibition effect of flame retardant＞ While performing surface observation or tentacle confirmation on the above-mentioned test sheet 1, put the test sheet 1 in a thermostat at 85°C for 48 hours, and then perform surface observation or tentacle confirmation. Whether the test sheet 1 is confirmed Investigate the foreign matter on the surface as an indicator of whether the foreign matter has separated the flame retardant. Then, the test sheet 1 was judged as "o" or "×" based on the following judgment criteria. The results are shown in Tables 1-22. In addition, when the test sheet 1 judges "o", the test sheet 1 is judged to pass, and when the test sheet 1 judges to be "×", the test sheet 1 is judged to be unacceptable. (Judgment criteria) ○: Test sheet 1 does not meet any of the following (i) and (ii) ×: Test sheet 1 meets at least one of the following (i) and (ii) (i) When performing surface observation or tentacle confirmation on test sheet 1, foreign matter was confirmed on the surface of test sheet 1 (ii) After placing the test piece 1 in a thermostat at 85°C for 48 hours, when performing surface observation or tentacle confirmation on the test piece 1, a foreign matter was confirmed on the surface of the test piece 1

＜Flame retardant＞ (1) In accordance with FMVSS (Federal Motor-Vehicle Safety Standard) No.302, conduct a combustion test of automotive interior materials to evaluate flame retardancy

For the above-mentioned test pieces 1 to 3, the flame retardancy was evaluated by a combustion test of automotive interior materials based on FMVSS No.302. Specifically, test pieces 1 to 3 are clamped by a pair of U-shaped metal clamps to keep them horizontal, and a 38mm flame is placed on the back of one end of the test pieces 1 to 3 for 15 seconds to calculate the self-extinguishing For the fixture, the burning time (combustion speed) is 254mm between the A mark line and the B mark line of the fixture. In addition, each U-shaped metal clamp is composed of two parallel extensions separated from each other, and a connecting portion connecting these extensions. The two extensions extend along the longitudinal direction of the test sheets 1 to 3 Fix both edges of the test sheet in the direction. In addition, for one of the two extensions, it is indicated that the A mark and the B mark are separated by 254 mm and cross the extension (a direction perpendicular to the Yuyan direction).

Then, judge the "〇" or "×" of the test sheets 1 to 3 based on the following judgment criteria. The results are shown in Tables 1-22. In addition, the test sheets 1 to 3 judged as "o" were passed from the standpoint of flame retardancy, and the test sheets 1 to 3 judged as "×" were unacceptable from the standpoint of flame retardancy. (Judgment criteria) 〇: Self-extinguishing or no self-extinguishing is seen, and the burning speed is 102mm/min or less ×: No self-extinguishing and burning speed over 102mm/min

(2) Evaluation of flame retardancy based on the VTM test of UL94 standard For each of Examples 1 to 82 and Comparative Examples 1 to 10, five test sheets 1 were prepared. For these five test sheets 1, the UL94 standard VTM test was performed to evaluate flame retardancy. Specifically, the test sheet 1 was wound with a mandrel with a diameter of 13 mm to produce a sample made of a cylindrical body with a length of 350 mm. Then, one end of the sample is fixed with a clamp, and the sample is arranged so that the center axis is parallel to the vertical direction. At this time, the raw material is arranged to mark the marking line at a position 125 mm from the lower end of the sample. On the other hand, degreasing cotton was placed under the sample and spread. Then, the tip of the burner was placed at a position 10 mm from the lower end of the sample for 3 seconds, and flame contact was made at the lower end of the sample. After flame contact, the burner is moved away from the sample and the afterflame time t1 is measured. Immediately after stopping the afterflame, move the burner under the sample and perform flame contact again. After flame contact, move the burner away from the sample, and measure the afterflame time t2 and embers time t3. Also, observe whether the sample burns to the marking line, or the sample ignites due to the dripping of smoking or dripping substances. Then, the test sheet 1 was evaluated according to the following evaluation levels. The results are shown in Tables 1-14. In addition, the flame retardancy becomes higher in the order of NOT, VTM-2, VTM-1, and VTM-0. (Evaluation level) VTM-0 ･For all test sheets 1, t1 or t2 is less than 10 seconds ･5 The t1+t2 of the sample (the total afterflame time for 10 times of flame contact) is 50 seconds or less ･For all test sheets 1, t2+t3 is 30 seconds or less ･The sample is not burned to the marking line, and the degreased cotton will not catch fire due to smoking or dripping VTM-1 ･For all test sheets 1, t1 or t2 is less than 30 seconds ･5 The t1+t2 of the sample (the total afterflame time for 10 times of flame contact) is 250 seconds or less ･For all test sheets 1, t2+t3 is less than 60 seconds ･The sample is not burned to the marking line, and the degreased cotton will not catch fire due to smoking or dripping VTM-2 ･For all test sheets 1, t1 or t2 is less than 30 seconds ･5 The t1+t2 of the sample (the total afterflame time for 10 times of flame contact) is 250 seconds or less ･For all test sheets 1, t2+t3 is less than 60 seconds ･The sample did not burn to the marking line, and the degreased cotton was on fire due to smoking or dripping NOT None of VTM-0, VTM-1 and VTM-2 are in compliance

＜Hydrolysis resistance＞ For each of Examples 1 to 121 and Comparative Examples 1 to 6, the test sheet 1 was placed in a thermostat at 85°C and 85% RH for 48 hours, and then surface observation or tentacle confirmation was performed. For the test sheet Check whether foreign matter is confirmed on the surface of 1 and use the foreign matter as an indicator of hydrolysis resistance. Then, the test sheet 1 is judged as "o" or "×" based on the following judgment criteria. The results are shown in Tables 1-12 and Tables 14-21. (Judgment criteria) ○: No foreign matter is confirmed on the surface of test sheet 1 ×: Foreign matter is confirmed on the surface of test piece 1

＜Odor＞ The odor is based on the following judgment criteria, and judgments were made on the above-mentioned test sheet 1 of Examples 26-29, 31-32, 43, 46-49, 83-121 and Comparative Examples 11-14. The results are shown in Tables 14-22. (Judgment criteria) 1: Almost no smell 2: A slight smell 3: Strongly feel the odor

＜Processability＞ A T-die was connected to a single-axis extruder (product name "Labo Plastomill", manufactured by Toyo Seiki Seisakusho), and the flame-retardant resin compositions of Examples 46 to 49 and 107 to 110 were put into A single-axis extruder produces a sheet for evaluation of workability with a thickness of 0.1 mm. At this time, the discharge amount and the drawing speed of the sheet are fixed. In addition, the sheet for processability evaluation was produced by setting the processing temperature in the uniaxial extruder at 230°C, 240°C, and 250°C. Then, it was investigated whether a hole was formed in the workability evaluation sheet during the 30-minute extrusion, and whether the hole was formed was used as an index of workability. Here, the formation of holes means the decrease in workability caused by the fluctuation of the discharge amount or the generation of bubbles. Then, the sheet for workability evaluation is judged as "○" or "×" based on the following judgment criteria. The results are shown in Tables 6 and 19. (Judgment criteria) ○: No hole formation was confirmed in the sheet for workability evaluation ×: Formation of holes was confirmed in the sheet for workability evaluation

＜Coloration when deteriorating＞ In order to evaluate the colorability, using the flame-retardant resin compositions of Examples 55 to 58 and 118 to 121, a test sheet 4 was further produced in the same manner as the above test sheet 1 except that the thickness was set to 1 mm. The test sheet 4 was placed in a thermostat at 85° C., and after standing for 5 days, the surface was observed to investigate whether the sheet was discolored. Then, based on the following judgment criteria, the test sheet 4 was judged as "o" or "x". The results are shown in Tables 8 and 21. (Judgment criteria) ○: No discoloration is seen on the sheet ×: Discoloration is seen on the sheet

From the results shown in Tables 1 to 22, it can be seen that in Examples 1 to 121, the evaluation results of the flame retardancy of the test sheet (test sheet 1) with a thickness of 0.1 mm are all "〇". 1 to 121 are qualified from the standpoint of flame retardancy. In contrast, Comparative Examples 1-14 are all marked as "×" from the evaluation results of the flame retardancy of the test sheet (test sheet 1) with a thickness of 0.1 mm, and Comparative Examples 1-14 are based on the flame retardancy. Seen as unqualified.

In addition, from the results shown in Tables 1-22, it is known that in Examples 1-121, the evaluation results of the separation inhibition effect of the flame retardant are all "〇", and Examples 1 to 121 are inhibited by the separation of the flame retardant. From the viewpoint of effect, it is qualified. In contrast, it is found that the evaluation results of the separation inhibition effect of the flame retardant in Comparative Examples 1-14 are all "×", and the comparative examples 1-14 are unacceptable from the viewpoint of the separation inhibition effect of the flame retardant. .

From the above, it can be confirmed that the flame-retardant resin composition according to the present invention has excellent flame-retardant properties and can suppress the separation of the flame-retardant agent.

And, as shown in the results in Tables 14-22, in Examples 43 and 83-121, the odor judgment results were all "1" or "2". In contrast, in Examples 26-29, 31-32, 46-49 and Comparative Examples 11-14, the odor judgment results were all "3". Therefore, it is found that a flame retardant resin composition whose blending ratio of the hindered amine compound (C) of 100 parts by mass of the base resin (A) is less than 0.4 parts by mass is higher than that for 100 parts by mass of the hindered amine compound of the base resin (A). (C) A flame-retardant resin composition with a mixing ratio of 0.4 parts by mass or more can further suppress odor.

Also, from the results shown in Table 11, for example, in Examples 64, 71 to 75 with a mass ratio R of 5.6 or more, the evaluation of the flame retardancy of the test sheet (test sheet 1) with a thickness of 0.1 mm The results (evaluation results of the VTM test according to UL94 standards) are all "VTM-0". Regarding this, in Example 76 in which the mass ratio R was less than 5.6, the evaluation result of the flame retardancy of the test sheet (test sheet 1) with a thickness of 0.1 mm was "VTM-2". In addition, from the results shown in Table 12, it can be seen that in Examples 56 and 77 to 81 with a mass ratio R of 5.6 or more, the evaluation results of the flame retardancy of the test sheet (test sheet 1) with a thickness of 0.1 mm (According to the evaluation result of VTM test according to UL94 standard) are all "VTM-0" In contrast, in Example 82 in which the mass ratio R was less than 5.6, the evaluation result of the flame retardancy of the test sheet (test sheet 1) with a thickness of 0.1 mm was "VTM-2". From this, it can be seen that a test piece with a mass ratio R of 5.6 or more and a test piece with a specific mass ratio R of less than 5.6 can further improve the flame retardancy.

1: Conductor (transmission medium) 2,25: Insulator 3: The first insulating layer (insulating part) 4: The second insulating layer (insulating part) 10, 20: Cable 24: Optical fiber (transmission medium)

[Fig. 1] A partial side view showing the first embodiment of the cable of the present invention. [Fig. 2] A cross-sectional view taken along the line II-II in Fig. 1. [Fig. 3] A cross-sectional view showing a second embodiment of the cable of the present invention.

1: Conductor (transmission medium)

2: Insulator

3: The first insulating layer (insulating part)

4: The second insulating layer (insulating part)

10: Cable

Claims (40)

A flame retardant resin composition characterized by containing: a base resin (A) containing a polyolefin resin and a flame retardant; the flame retardant contains an organophosphorus compound (B) and a hindered amine compound (C); the organophosphorus The compound (B) is represented by the following general formula (1), and the aforementioned hindered amine compound (C) has a group represented by the following general formula (2);

(In the above general formula (1), X ¹ and X ² represent hydrocarbon groups that may have substituents, which may be the same or different);

(In the above general formula (2), R ¹ to R ⁴ each independently represent an alkyl group with 1 to 8 carbons, and R ⁵ represents an alkyl group with 1 to 50 carbons, a cycloalkyl group with 5 to 12 carbons, and 7-25 aralkyl or 6-12 aryl). The flame-retardant resin composition of claim 1, wherein in the general formula (1), the hydrocarbon group represented by X ¹ and X ² is an aliphatic hydrocarbon group or an aromatic hydrocarbon group. The flame-retardant resin composition of claim 2, wherein in the aforementioned general formula (1), the aforementioned hydrocarbon groups represented by X ¹ and X ² are aromatic hydrocarbon groups. The flame retardant resin composition of claim 3, wherein the aforementioned aromatic hydrocarbon group is a phenylmethyl group. For the flame-retardant resin composition of claim 3 or 4, the flame-retardant resin composition is placed in a thermostat at 85° C. and 85% RH and left for 48 hours. When surface observation or tentacle confirmation was performed, no foreign matter was confirmed on the surface. The flame retardant resin composition according to any one of claims 1 to 5, wherein the hindered amine compound (C) is added in a ratio of less than 0.4 parts by mass to 100 parts by mass of the base resin (A). The flame retardant resin composition according to any one of claims 1 to 6, wherein the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is 5.6 or more. The flame retardant resin composition of claim 7, wherein the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is 11.1 or less. The flame retardant resin composition according to any one of claims 1 to 8, wherein the number of groups represented by the general formula (2) in 1 g unit in the hindered amine compound (C) is 1×10 ²¹ or more . The flame retardant resin composition according to any one of claims 1 to 9, wherein the hindered amine compound (C) has a plurality of groups represented by the general formula (2) in one molecule. The flame-retardant resin composition according to any one of claims 1 to 10, wherein in the aforementioned general formula (2), R ⁵ represents an alkyl group having 1 to 30 carbon atoms, or a cycloalkyl group having 5 to 12 carbon atoms. The flame retardant resin composition according to any one of claims 9 to 11, wherein the hindered amine compound (C) is solid at 25°C. The flame retardant resin composition according to any one of claims 9 to 12, wherein the hindered amine compound (C) has a decomposition temperature of 240°C or higher. The flame retardant resin composition according to any one of claims 1 to 13, wherein the hindered amine compound (C) contains a triazine ring. The flame-retardant resin composition of claim 14, wherein in the aforementioned general formula (2), R ⁵ represents a cycloalkyl group having 5 to 12 carbon atoms. The flame retardant resin composition according to any one of claims 13 to 15, wherein the hindered amine compound (C) has a decomposition temperature of 250°C or higher. The flame-retardant resin composition of claim 16, wherein in the aforementioned general formula (2), R ⁵ represents an alkyl group having 1 to 30 carbon atoms. The flame retardant resin composition according to any one of claims 1 to 12, wherein the hindered amine compound (C) does not contain a triazine ring. The flame-retardant resin composition according to any one of claims 1 to 18, which further contains a drip preventive agent (D). The flame retardant resin composition of any one of claims 1 to 19, wherein the melting point of the organic phosphorus compound (B) is higher than the melting temperature of the base resin (A), and the melting point of the hindered amine compound (C) is higher than The melting temperature of the aforementioned base resin (A) is low. The flame-retardant resin composition of claim 20, wherein the melting point of the aforementioned organophosphorus compound (B) is higher than the melting temperature of the aforementioned base resin (A) by more than 40°C. The flame retardant resin composition of claim 20 or 21, wherein the melting point of the hindered amine compound (C) is lower than the melting temperature of the base resin (A) by 3°C or more. The flame retardant resin composition according to any one of claims 1 to 5 and 7 to 22, wherein the compounding ratio of the hindered amine compound (C) is 0.5 parts by mass or more with respect to 100 parts by mass of the base resin (A). The flame retardant resin composition according to any one of claims 1 to 23, wherein the compounding ratio of the organophosphorus compound (B) is 5 parts by mass or more with respect to 100 parts by mass of the base resin (A). The flame retardant resin composition according to any one of claims 1 to 24, wherein the flame retardant contains only the organophosphorus compound (B) and the hindered amine compound (C). The flame-retardant resin composition of any one of claims 1-25, which does not meet any of the following (i) and (ii); (i) For the aforementioned flame-retardant resin composition, when surface observation or tentacle confirmation is performed, foreign matter is confirmed on the surface of the aforementioned flame-retardant resin composition; (ii) After placing the flame-retardant resin composition in a thermostat at 85°C for 48 hours, the flame-retardant resin composition should be tested on the surface of the flame-retardant resin composition during surface observation or tentacle confirmation. A foreign body was confirmed on the surface. Such as the flame-retardant resin composition of any one of claims 1 to 26, which meets any of the following requirements (a) or (b) when the combustion test of automotive interior materials is performed in accordance with FMVSS No. 302 ； (a) Self-extinguishing when seen (b) Although no self-extinguishing is seen, the burning rate is 102 mm/min or less. A flame-retardant resin composition for cables, characterized by containing the flame-retardant resin composition according to any one of claims 1 to 27. A cable characterized by having a transmission medium composed of a conductor or an optical fiber, and an insulator covering the transmission medium; the insulator contains a flame-retardant resin composition as defined in any one of claims 1-27 The insulation part. A molded body characterized by containing the flame-retardant resin composition according to any one of claims 1 to 27. The molded body of claim 30 is a sheet layer containing at least one flame retardant resin composition. A flame-retardant masterbatch characterized by containing the flame-retardant resin composition according to any one of claims 1-27. A flame retardant characterized by containing an organophosphorus compound (B) and a hindered amine compound (C); the aforementioned organophosphorus compound (B) represents the following general formula (1), and the aforementioned hindered amine compound (C) has the following general The base shown in formula (2);

(In the above general formula (1), X ¹ and X ² represent hydrocarbon groups that may have substituents, and they may be the same or different)

(In the above general formula (2), R ¹ to R ⁴ each independently represent an alkyl group with 1 to 8 carbons, and R ⁵ represents an alkyl group with 1 to 50 carbons, a cycloalkyl group with 5 to 12 carbons, and 7-25 aralkyl or 6-12 aryl). The flame retardant according to claim 33, wherein for the aforementioned general formula (1), the aforementioned hydrocarbon group represented by X ¹ and X ² is an aliphatic hydrocarbon group or an aromatic hydrocarbon group. The flame retardant of claim 34, wherein for the aforementioned general formula (1), the aforementioned hydrocarbon group represented by X ¹ and X ² is an aromatic hydrocarbon group. The flame retardant of claim 34 or 35, wherein the aforementioned aromatic hydrocarbon group is phenylmethyl. The flame retardant according to any one of claims 33 to 36, wherein the melting point of the aforementioned organophosphorus compound (B) is higher than the melting point of the aforementioned hindered amine compound (C). The flame retardant according to any one of claims 33 to 37, which contains only the aforementioned organophosphorus compound (B) and the aforementioned hindered amine compound (C). The flame retardant according to any one of claims 33 to 38, wherein the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is 5.6 or more. The flame retardant of claim 39, wherein the mass ratio of the organophosphorus compound (B) to the hindered amine compound (C) is 11.1 or less.

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